Measurement of $W^+W^-$ production in association with one jet in proton--proton collisions at $\sqrt{s} =8$ TeV with the ATLAS detector

G. Aad 1 M. Alstaty 1 M. Barbero 1 A. Calandri 1 T.P. Calvet 1 Y. Coadou 1 C. Diaconu 1 F. Djama 1 V. Ellajosyula 1 L. Feligioni 1 A. Hadef 1 G.D. Hallewell 1 F. Hubaut 1 S.J. Kahn 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 J. Liu 1 K. Liu 1 D. Madaffari 1 E. Monnier 1 S. Muanza 1 E. Nagy 1 P. Pralavorio 1 Y. Rodina 1 A. Rozanov 1 M. Talby 1 T. Theveneaux-Pelzer 1 R.E. Ticse Torres 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 L. Vacavant 1 Chen Wang 1 D. Boumediene 2 E. Busato 2 D. Calvet 2 S. Calvet 2 A.R. Chomont 2 J. Donini 2 S. Ganguly 2 Ph. Gris 2 R. Madar 2 D. Pallin 2 S.M. Romano Saez 2 C. Santoni 2 D. Simon 2 F. Vazeille 2 N. Berger 3 M. Delmastro 3 L. Di Ciaccio 3 S. Elles 3 K. Grevtsov 3 T. Guillemin 3 T. Hryn’ova 3 S. Jézéquel 3 I. Koletsou 3 R. Lafaye 3 Jérémy Lévêque 3 P. Mastrandea 3 E. Sauvan 3 B.H. Smart 3 T. Todorov 3 I. Wingerter-Seez 3 E. Yatsenko 3 S. Albrand 4 S. Berlendis 4 A. Bethani 4 C. Camincher 4 J. Collot 4 S. Crépé-Renaudin 4 P.A. Delsart 4 C. Gabaldon 4 M.H. Genest 4 P.O.J. Gradin 4 J.Y. Hostachy 4 F. Ledroit-Guillon 4 A. Lleres 4 A. Lucotte 4 F. Malek 4 E. Petit 4 J. Stark 4 B. Trocmé 4 M. Wu 4 G. Rahal 5 M.K. Ayoub 6 A. Bassalat 6 S. Binet 2 C. Becot C. Bourdarios 6 J.B. de Vivie De Regie 6 D. Delgove 6 L. Duflot M. Escalier 6 L. Fayard 6 D. Fournier 6 E.L. Gkougkousis 6 J.-F. Grivaz 6 F. Hariri 6 S. Henrot-Versille 6 J. Hrivnac 6 L. Iconomidou-Fayard 6 M. Kado 6 A. Lounis 6 N. Makovec 6 N. Morange 6 C. Nellist 6 P. Petroff 6 L. Poggioli 6 P. Puzo 6 A. Renaud 6 G. Rybkin 6 D. Rousseau 6 A.C. Schaffer 6 L. Serin 6 E. Scifo 6 S. Simion 6 R. Tanaka 6 D. Zerwas 6 Zhongkai Zhang 6 Y. Zhao 6
1 CPPM - Centre de Physique des Particules de Marseille
2 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
3 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - Laboratoire d'Annecy de Physique des Particules
4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
5 CC-IN2P3 - Centre de Calcul de l'IN2P3
6 LAL - Laboratoire de l'Accélérateur Linéaire
Abstract : The production of $W$ boson pairs in association with one jet in $pp$ collisions at $\sqrt{s} = 8$ TeV is studied using data corresponding to an integrated luminosity of 20.3 fb$^{-1}$ collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The cross section is measured in a fiducial phase-space region defined by the presence of exactly one electron and one muon, missing transverse momentum and exactly one jet with a transverse momentum above 25 GeV and a pseudorapidity of $|\eta|<4.5$. The leptons are required to have opposite electric charge and to pass transverse momentum and pseudorapidity requirements. The fiducial cross section is found to be $\sigma^{\mathrm{fid,1\textrm{-}jet}}_{WW}=136\pm6($stat$)\pm14($syst$)\pm3($lumi$)$ fb. In combination with a previous measurement restricted to leptonic final states with no associated jets, the fiducial cross section of $WW$ production with zero or one jet is measured to be $\sigma^{\mathrm{fid,}\leq\mathrm{1\textrm{-}jet}}_{WW}=511\pm9($stat$)\pm26($syst$)\pm10($lumi$)$ fb. The ratio of fiducial cross sections in final states with one and zero jets is determined to be $0.36\pm0.05$. Finally, a total cross section extrapolated from the fiducial measurement of $WW$ production with zero or one associated jet is reported. The measurements are compared to theoretical predictions and found in good agreement.
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Journal articles
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http://hal.in2p3.fr/in2p3-01353313
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Submitted on : Thursday, August 11, 2016 - 8:16:09 AM
Last modification on : Tuesday, November 5, 2019 - 4:32:43 PM

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IN2P3 | LPC-CLERMONT | CPPM | UNIV-SAVOIE | UNIV-AMU | PRES_CLERMONT | LAPP | LPSC | UGA | LAL | UNIV-PARIS-SACLAY

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G. Aad, M. Alstaty, M. Barbero, A. Calandri, T.P. Calvet, et al.. Measurement of $W^+W^-$ production in association with one jet in proton--proton collisions at $\sqrt{s} =8$ TeV with the ATLAS detector. Physics Letters B, Elsevier, 2016, 763, pp.114-133. ⟨10.1016/j.physletb.2016.10.014⟩. ⟨in2p3-01353313⟩

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